I can confirm, Wrexham General (ex-GWR line to Shrewsbury), attached to which was Wrexham Exchange, on the ex-GC line into Wrexham Central which was an end on junction with the ex-GWR line to Ellesmere.
Seeing the maps of Shotton (High Level on the GC route, Low Level on the North Wales Coast line) reminds me of an incident whilst waiting for the train to Wrexham at Shotton High Level (I went to Kelsterton College, by train, in the late '70's). A friend had bought some salted peanuts and offered me a handful. Being a cocky teenager, I threw one up in the air, mouth open, and caught it! Then, upping the ante, I threw up two peanuts. Mouth open, one in. Step back to catch the other, straight off the edge of the platform! Luckily, train was late and no other passengers were waiting on the platform, but my friends never let me forget it.